Scientists may one day be able to address organ donation shortages and the need for immunosuppressant drugs for transplants by creating artificial human organs via 3D printing.

A team of Heriot-Watt University scientists, led by Dr. Will Shu, has successfully used 3D printing to create clusters of embryonic stem cells -- which could, at some point, be used to produce artificial organs.

The team used an adjustable microvalve as a 3D printing technique, where layers of human embryonic stem cells (hESCs) were built up to create clusters of cells. HESCs are derived from early stage embryos and are capable of transforming into any tissue in the body.

"We found that the valve-based printing is gentle enough to maintain high stem cell viability, accurate enough to produce spheroids of uniform size, and most importantly, the printed hESCs maintained their pluripotency - the ability to differentiate into any other cell type," said Shu.

The technique will use cloning to create hESCs that have the patient's own genetic programming contained, meaning that the artificial organ from which the hESCs are made will not trigger a negative immune response when transplanted.

They're similar, but not exactly the same thing. There are more than 2 kinds of stem cells. But even if embryonic stem cells are used as a research gateway, at some point we have to make the switch. Stem cells usage and application will eventually become mainstream like McDonald's french fries and there will be issues of scalability. OR we can just put our daughters on conveyer belts...

Not even mentioning tissue rejection... now *THAT* is something people always forget about when borrowing tissue from others. A lifetime's curse of immunosuppressive drugs.